TY  - JOUR
AU  - Ren, X. L.
AU  - Oset, E.
AU  - Alvarez-Ruso, L.
AU  - Vicente Vacas, M. J.
PY  - 2015
DA  - 2015//
TI  - Antineutrino induced Lambda(1405) production off the proton
T2  - Phys. Rev. C
JO  - Physical Review C
SP  - 045201
EP  - 11pp
VL  - 91
IS  - 4
PB  - Amer Physical Soc
AB  - We have studied the strangeness-changing antineutrino-induced reactions (v) over bar (l)p -> l(+)phi B, with phi B = K(-)p, (K) over bar (0)n, pi(0)Lambda, pi(0)Sigma(0), eta Lambda, eta Sigma(0), pi(+)Sigma(-), pi(-)Sigma(+), K+Xi(-), and K-0 Xi(0), using a chiral unitary approach. These ten coupled channels are allowed to interact strongly, using a kernel derived from the chiral Lagrangians. This interaction generates two Lambda(1405) poles, leading to a clear single peak in the pi Sigma invariant mass distributions. At backward scattering angles in the center-of-mass frame, (nu) over bar (mu)p -> mu(+)pi(0)Sigma(0) is dominated by the Lambda(1405) state at around 1420 MeV while the lighter state becomes relevant as the angle decreases, leading to an asymmetric line shape. In addition, there are substantial differences in the shape of pi Sigma invariant mass distributions for the three charge channels. If observed, these differences would provide valuable information on a claimed isospin I = 1, strangeness S = -1 baryonic state around 1400 MeV. Integrated cross sections have been obtained for the pi Sigma and (K) over barN channels and the impact of unitarization in the results has been investigated. The number of events with Lambda(1405) excitation in (nu) over bar μp collisions in the recent antineutrino run at the Main Injector Experiment for nu-A (MINER nu A) has also been obtained. We find that this reaction channel is relevant enough to be investigated experimentally and to be taken into account in the simulation models of future experiments with antineutrino beams.
SN  - 0556-2813
UR  - http://arxiv.org/abs/1501.04073
UR  - https://doi.org/10.1103/PhysRevC.91.045201
DO  - 10.1103/PhysRevC.91.045201
LA  - English
N1  - WOS:000352190300006
ID  - Ren_etal2015
ER  -